Study on the Ground Movement in an Open-Pit Mine in the Case of Combined Surface and Underground Mining

Table 1

Proportions of the physical materials in terms of weight to construct different lithologies in the physical model.

Lithologies in the model	Percentage of the solid materials by weight			Percentage of the water over solid materials by weight (%)
	Sand (%)	Gypsum (%)	Lime (%)
Artificial fill	87.5	8.75	3.75	10
Loose soil	87.5	8.75	3.75	10
Weathered sandstone	80	10	10	10
Sandstone	75	12.5	12.5	10
Clay	85.7	4.3	10	10
No. 4 coal seam	83.3	8.35	8.35	10
Sandy mudstone	85.7	4.3	10	10
Fine sandstone	80	6	14	10
Siltstone	80	6	14	10
Malmstone	80	10	10	10
No. 9 coal seam	83.3	8.35	8.35	10
Mudstone	80	10	10	10
No. 11 coal seam	83.3	8.35	8.35	10
Medium-fine sandstone	75	7.5	17.5	10